Our Solar System

the spacecraft that provided new information about the rings of Saturn

12.

largest volcano in the solar system

15.

Saturn's largest moon

18.

a planet's year is determined by it period of __________

22.

one of the most common greenhouse gases

23.

one of two recent rovers on the surface of Mars

24.

small cratered planet named for the messenger of the gods

25.

Earth's Twin

28.

shape of of Pluto's orbit

29.

Mars has seasons because of its ____ axis.

30.

Uranus's blue-green color comes from traces of this gas in its atmosphere

31.

a continuous storm on Jupiter is responsible for this telltale feature of the planet

Down

2.

frozen water and carbon dioxide are found in these Martian features

3.

the larger of Mars' two moons that is slowly spiraling to its surface

4.

largest moon in the solar system

6.

clouds on Venus are mostly droplets of _____

7.

massive members of the solar system without solid surfaces

9.

sun-centered model of the universe

10.

planet whose day is longer than its year

11.

a planet's day is determined by its period of ________

13.

planet with the greatest range of temperatures

14.

irregularities in the orbit of this planet led to the discovery of Neptune

16.

retention of heat caused by thick gaseous atmosphere

17.

this chemical compound give Mars its red color

19.

the planet described as cold, blue and shrouded in clouds

20.

small, dense, rocky (plural)

21.

phase of water on Earth's surface that is unique in the solar system

26.

the Great Dark Spot on Neptune was caused by a(n)________

27.

god of the underworld and a dwarf planet

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